Up to 40% of northeastern Asians experience flushing and elevated heart rate after drinking even minimal amounts of alcohol, due to accumulation of acetaldehyde. This is because of a mutation in acetaldehyde dehydrogenase (ALDH2), the enzyme that converts acetaldehyde to acetate.
When you use Outlook, the operating system saves your files in the \Documents and Settings\ directory for your user name. This directory saves some user-specific configurations, including the contact files used in your Outlook installation. Each Outlook file can be identified by its extension. Contacts are saved with the \.pab\ file extension.
File-Extensions.org - The world's largest file extension library File extension or filename suffix is usually three, four or more characters at the end of computer file names divided by a dot. File extensions are useful to computer programs and operating systems like Windows or macOS (OS X), and basically telling them, what kind of data and file type they are working with and what associated program opens the file. File-extensions.org library contains thousands of file extensions and the database is still growing. A large number of file type entries have detailed descriptions, including their current use and the list of programs that can open, view, edit, convert or play unknown file you search for.